Our typography rules call for a non-breaking space when discussing units and abbreviations ("a marathon is run over a distance of 42.195 km" calls for 42.195&nbsp;km ; "water boils at 100 °C" requires 100&nbsp;°C ; "Mary Shelley created the character of Dr. Frankenstein" includes Dr.&nbsp;Frankenstein ). I frequently use it in every law-related article in relation to the "§" sign, an example for this would be the article on Mietvertrag (Deutschland).

We already have the ability to use different label on the button than the character that will be inserted (we use it for more meaningful labels for combining characters, and in fact for invisible ones like zero-width non-joiner and joiner). We should probably make the label say "NBSP" if we do this.